﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;
using System.Diagnostics;

namespace Xceed.Silverlight.Data
{
  [DebuggerNonUserCode]
  internal class DependentCallResult
  {
    internal DependentCallResult( object data )
      : this( data, null, null )
    {
    }

    internal DependentCallResult(
      object data,
      Func<AsyncCallback, object, IAsyncResult> nextDependentAsyncCall,
      Func<AsyncResult, IAsyncResult, DependentCallResult> nextDependentIntermediateCallback )
    {
      if( nextDependentAsyncCall == null && nextDependentIntermediateCallback != null )
        throw new DataInternalException();

      this.ResultData = data;

      if( nextDependentAsyncCall != null )
      {
        this.NextCall = new DependentCall(
                              nextDependentAsyncCall,
                              nextDependentIntermediateCallback );
      }
      else
      {
        this.NextCall = null;
      }
    }

    internal DependentCallResult( object data, DependentCall nextCall )
    {
      this.ResultData = data;
      this.NextCall = nextCall;
    }



    public object ResultData
    {
      get;
      private set;
    }

    public DependentCall NextCall
    {
      get;
      private set;
    }
  }
}
